<template>
    <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
        <el-alert title="添加商品信息" type="info" show-icon center :closable="false">
        </el-alert>
    <el-steps :space="200" :active="activeIndex - 0" finish-status="success"  align-center>
    <el-step title="基本信息"></el-step>
    <el-step title="商品参数"></el-step>
    <el-step title="商品属性"></el-step>
    <el-step title="商品图片"></el-step>
    <el-step title="商品内容"></el-step>
    <el-step title="完成"></el-step>
    </el-steps>

    <!-- Tab栏切换 -->
    <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
    <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave	="beforeTableave" @tab-click="tabClick">
        <!-- 0 -->
    <el-tab-pane label="基本信息" name="0">
        <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
        </el-form-item>
        <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addForm.goods_price" type="number"></el-input>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight" >
            <el-input v-model="addForm.goods_weight" type="number"></el-input>
        </el-form-item>
        <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number"></el-input>
        </el-form-item>
        <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader
            v-model="addForm.goods_cat"
            :options="cateList"
            :props="cateOptions"
            expand-trigger="hover"
            @change="handleChange"></el-cascader>
        </el-form-item>
    </el-tab-pane>
    <!-- 1 -->
    <el-tab-pane label="商品参数" name="1">
        <!-- 渲染表单的item项 -->
        <el-form-item :label="item.attr_name" v-for="item in manyTabData" :key="item.attr_id">
            <!-- 渲染复选框 -->
            <el-checkbox-group v-model="item.attr_vals">
            <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
            </el-checkbox-group>
        </el-form-item>
    </el-tab-pane>
    <!-- 2 -->
    <el-tab-pane label="商品属性" name="2">
        <el-form-item v-for="item in onlyTabData" :key="item.attr_id" :label="item.attr_name">
            <el-input v-model="item.attr_vals"></el-input>
        </el-form-item>
    </el-tab-pane>
    <!-- 3 -->
    <el-tab-pane label="商品图片" name="3">
        <!-- 图片上传 -->
        <el-upload 
  :action="uploadUrl"
  :on-preview="handlePreview"
  :on-remove="handleRemove"
  list-type="picture"
  :headers="headersObj"
  :on-success="handleSuccess">
  <el-button size="small" type="primary">点击上传</el-button>
</el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容" name="4">
         <quill-editor v-model="addForm.goods_introduce">

         </quill-editor>
          <el-button type="primary" class="addBtn" @click="add">添加商品</el-button>
    </el-tab-pane>
    </el-tabs>
    </el-form>
    </el-card>

    <!-- 图片预览对话框 -->
    <el-dialog
  title="图片预览"
  :visible.sync="PreviewDialog"
  width="50%">
  <img :src="PreviewUrl" alt="" class="PreviewImg">
</el-dialog>
    </div>
</template>
<script>
import _ from 'lodash'
export default {
    data(){
        return{
            activeIndex:"0",
            // 添加商品的表单数据
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                goods_cat:[],
                pics:[],
                goods_introduce:'',
                attrs:[]
            },
            // 添加商品的表单验证规则
            addFormRules:{
                goods_name:[
                    { required: true, message: '请输入商品名称', trigger: 'blur' }
                ],
                goods_price:[{
                    required: true, message: '请输入商品价格', trigger: 'blur' 
                }],
                goods_weight:[{
                    required: true, message: '请输入商品重量', trigger: 'blur' 
                }],
                goods_number:[{
                    required: true, message: '请输入商品数量', trigger: 'blur' 
                }],
                goods_cat:[{
                    required: true, message: '请选择商品分类', trigger: 'blur'
                }]
            },
            cateList:[],
            cateOptions:{
                label:'cat_name',
                value:'cat_id',
                children:'children'
            },
            // 动态参数数据
            manyTabData:[],
            // 静态参数数据
            onlyTabData:[],
            // 图片上传的根路径地址
            uploadUrl:'http://127.0.0.1:8888/api/private/v1/upload',
            // 给上传图片设置请求头
            headersObj:{
            Authorization: window.sessionStorage.getItem('token')
        },
            PreviewUrl:'',
            PreviewDialog:false
        }
       
    },
    created(){
        this.getCateList()
    },
    methods:{
        // 获取商品分类列表
        async getCateList(){
           const {data:res}= await this.$http.get('categories')
           if(res.meta.status!==200){return this.$message.error('获取商品列表失败')}
           this.cateList=res.data
           console.log(this.cateList);
        },
        // 级联选择器发生切换时
        handleChange(){
            console.log(this.addForm.goods_cat);
            if(this.addForm.goods_cat.length!==3){
                this.addForm.goods_cat=[]
            }
        },
        // Tab栏发生切换时 activeName即将进入的标签页名称 oldActiveName即将离开的标签页名称
        beforeTableave(activeName, oldActiveName){
            if(oldActiveName==='0'&&this.addForm.goods_cat.length!==3){
                this.$message.error('请先选择商品分类')
                return false
            }
        },
        // tab发生点击是触发
       async tabClick(){
            // console.log(this.activeIndex);
            if(this.activeIndex==='1'){
               const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
               if(res.meta.status!==200){return this.$message.error('获取动态参数失败')}
            //    把attr_vals的值转化为数组
                res.data.forEach(item=>{
                    item.attr_vals=item.attr_vals.length===0?[]:item.attr_vals.split(' ')
                })
                this.manyTabData=res.data
               console.log(res);
            }
            if(this.activeIndex==='2'){
                const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
               if(res.meta.status!==200){return this.$message.error('获取动态参数失败')}
               this.onlyTabData=res.data
               console.log(this.onlyTabData);
            }
        },
        // 处理图片预览效果
        handlePreview(file){
            console.log(file);
           this.PreviewUrl= file.response.data.url
           this.PreviewDialog=true
        },
        // 图片移除时触发
        handleRemove(file){
            // console.log(file);
            // 1.找到要删除图片的地址
            const filePath = file.response.data.tmp_path
            // 2.根据地址找到索引
            const i =this.addForm.pics.findIndex(x=>{
                x.pic===filePath
            })
            // 3.根据索引删除图片
            this.addForm.pics.splice(i,1)
            // console.log(this.addForm);
        },
        // 文件上传成功调用
        handleSuccess(response){
            // 拼接得到一个图片信息对象
            const picInfo={pic:response.data.tmp_path}
            // 将图片信息对象Push到数组中
            this.addForm.pics.push(picInfo)
            
        },
        add(){
        //    console.log(this.addForm);
        this.$refs.addFormRef.validate(async val=>{
            if(!val) {return this.$message.error('请填写必要的表单项')}
            // 执行添加的业务逻辑
            const form = _.cloneDeep(this.addForm)
            form.goods_cat=form.goods_cat.join(',')
            // console.log(form);
             this.manyTabData.forEach(item=>{
            const newInfo = {attr_id:item.attr_id,
            attr_value:item.attr_value.join(' ')
            }
            this.addForm.attrs.push(newInfo)
        })

        this.onlyTabData.forEach(item=>{
            const newInfo = {attr_id:item.attr_id,
            attr_value:item.attr_value.join(' ')
            }
            this.addForm.attrs.push(newInfo)
        })
            form.attrs=this.addForm.attrs

           const {data:res}=await this.$http.post('goods',form)
           if(res.meta.status!==201){return this.$message.error('添加商品失败')}
console.log(form);
           this.$message.success('添加商品成功')
           this.$router.push('/goods')
           console.log(res);
        })
 }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>
<style lang="less" scoped>
.el-cascader{
    width: 200px;
}
.el-checkbox{
    margin:0 5px 0 0!important;
}
.PreviewImg{
    width: 100%;
}
.addBtn{
    margin-top: 15px;
}
</style>